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RFC 1850 - 3.1. OSPF General Variables

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### 3.1. OSPF General Variables

    --  OSPF General Variables

    --      These parameters apply globally to the Router's
    --      OSPF Process.

    ospfGeneralGroup OBJECT IDENTIFIER ::= { ospf 1 }

        ospfRouterId OBJECT-TYPE
            SYNTAX   RouterID
            MAX-ACCESS   read-write
            STATUS   current
            DESCRIPTION
               "A  32-bit  integer  uniquely  identifying  the
               router in the Autonomous System.

               By  convention,  to  ensure  uniqueness,   this
               should  default  to  the  value  of  one of the
               router's IP interface addresses."
           REFERENCE
              "OSPF Version 2, C.1 Global parameters"
          ::= { ospfGeneralGroup 1 }

        ospfAdminStat OBJECT-TYPE
            SYNTAX   Status
            MAX-ACCESS   read-write
            STATUS   current
            DESCRIPTION
               "The  administrative  status  of  OSPF  in  the
               router.   The  value 'enabled' denotes that the
               OSPF Process is active on at least  one  inter-
               face;  'disabled'  disables  it  on  all inter-
               faces."
           ::= { ospfGeneralGroup 2 }

        ospfVersionNumber OBJECT-TYPE
            SYNTAX   INTEGER    { version2 (2) }
            MAX-ACCESS   read-only
            STATUS   current
            DESCRIPTION
               "The current version number of the OSPF  proto-
               col is 2."
           REFERENCE
              "OSPF Version 2, Title"
          ::= { ospfGeneralGroup 3 }

        ospfAreaBdrRtrStatus OBJECT-TYPE
            SYNTAX   TruthValue
            MAX-ACCESS   read-only
            STATUS   current
            DESCRIPTION
               "A flag to note whether this router is an  area
               border router."
           REFERENCE
              "OSPF Version 2, Section 3 Splitting the AS into
              Areas"
          ::= { ospfGeneralGroup 4 }

        ospfASBdrRtrStatus OBJECT-TYPE
            SYNTAX   TruthValue
            MAX-ACCESS   read-write
            STATUS   current
            DESCRIPTION
               "A flag to note whether this router is  config-
               ured as an Autonomous System border router."
           REFERENCE
              "OSPF Version 2, Section 3.3  Classification  of
              routers"
          ::= { ospfGeneralGroup 5 }

        ospfExternLsaCount OBJECT-TYPE
            SYNTAX   Gauge32
            MAX-ACCESS   read-only
            STATUS   current
            DESCRIPTION
               "The number of external (LS type 5)  link-state
               advertisements in the link-state database."
           REFERENCE
              "OSPF Version 2, Appendix A.4.5 AS external link
              advertisements"
          ::= { ospfGeneralGroup 6 }

        ospfExternLsaCksumSum OBJECT-TYPE
            SYNTAX   Integer32
            MAX-ACCESS   read-only
            STATUS   current
            DESCRIPTION
               "The 32-bit unsigned sum of the LS checksums of
               the  external  link-state  advertisements  con-
               tained in the link-state  database.   This  sum
               can  be  used  to determine if there has been a
               change in a router's link state  database,  and
               to  compare  the  link-state  database  of  two
               routers."
           ::= { ospfGeneralGroup 7 }

        ospfTOSSupport OBJECT-TYPE
            SYNTAX   TruthValue
            MAX-ACCESS   read-write
            STATUS   current
            DESCRIPTION
               "The router's support for type-of-service rout-
               ing."
           REFERENCE
              "OSPF Version 2,  Appendix  F.1.2  Optional  TOS
              support"
          ::= { ospfGeneralGroup 8 }

        ospfOriginateNewLsas OBJECT-TYPE
            SYNTAX   Counter32
            MAX-ACCESS   read-only
            STATUS   current
            DESCRIPTION
               "The number of  new  link-state  advertisements
               that  have been originated.  This number is in-
               cremented each time the router originates a new
               LSA."
           ::= { ospfGeneralGroup 9 }

        ospfRxNewLsas OBJECT-TYPE
            SYNTAX   Counter32
            MAX-ACCESS   read-only
            STATUS   current
            DESCRIPTION
               "The number of  link-state  advertisements  re-
               ceived  determined  to  be  new instantiations.
               This number does not include  newer  instantia-
               tions  of self-originated link-state advertise-
               ments."
           ::= { ospfGeneralGroup 10 }

        ospfExtLsdbLimit OBJECT-TYPE
            SYNTAX   Integer32 (-1..'7FFFFFFF'h)
            MAX-ACCESS   read-write
            STATUS   current
            DESCRIPTION
               "The  maximum   number   of   non-default   AS-
               external-LSAs entries that can be stored in the
               link-state database.  If the value is -1,  then
               there is no limit.

               When the number of non-default AS-external-LSAs
               in   a  router's  link-state  database  reaches
               ospfExtLsdbLimit, the router  enters  Overflow-
               State.   The   router  never  holds  more  than
               ospfExtLsdbLimit  non-default  AS-external-LSAs
               in  its  database. OspfExtLsdbLimit MUST be set
               identically in all routers attached to the OSPF
               backbone  and/or  any regular OSPF area. (i.e.,
               OSPF stub areas and NSSAs are excluded)."
           DEFVAL { -1 }
           ::= { ospfGeneralGroup 11 }

        ospfMulticastExtensions OBJECT-TYPE
            SYNTAX   Integer32
            MAX-ACCESS   read-write
            STATUS   current
            DESCRIPTION
               "A Bit Mask indicating whether  the  router  is
               forwarding  IP  multicast  (Class  D) datagrams
               based on the algorithms defined in  the  Multi-
               cast Extensions to OSPF.

               Bit 0, if set, indicates that  the  router  can
               forward  IP multicast datagrams in the router's
               directly attached areas (called intra-area mul-
               ticast routing).

               Bit 1, if set, indicates that  the  router  can
               forward  IP  multicast  datagrams  between OSPF
               areas (called inter-area multicast routing).

               Bit 2, if set, indicates that  the  router  can
               forward  IP  multicast  datagrams between Auto-
               nomous Systems (called inter-AS multicast rout-
               ing).

               Only certain combinations of bit  settings  are
               allowed,  namely: 0 (no multicast forwarding is
               enabled), 1 (intra-area multicasting  only),  3
               (intra-area  and  inter-area  multicasting),  5
               (intra-area and inter-AS  multicasting)  and  7
               (multicasting  everywhere). By default, no mul-
               ticast forwarding is enabled."
           DEFVAL { 0 }
           ::= { ospfGeneralGroup 12 }

        ospfExitOverflowInterval OBJECT-TYPE
            SYNTAX   PositiveInteger
            MAX-ACCESS   read-write
            STATUS   current
            DESCRIPTION
               "The number of  seconds  that,  after  entering
               OverflowState,  a  router will attempt to leave
               OverflowState. This allows the router to  again
               originate  non-default  AS-external-LSAs.  When
               set to 0, the router will not  leave  Overflow-
               State until restarted."
           DEFVAL { 0 }
           ::= { ospfGeneralGroup 13 }

        ospfDemandExtensions OBJECT-TYPE
            SYNTAX   TruthValue
            MAX-ACCESS   read-write
            STATUS   current
            DESCRIPTION
               "The router's support for demand routing."
           REFERENCE
              "OSPF Version 2, Appendix on Demand Routing"
          ::= { ospfGeneralGroup 14 }

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RFC 1850 - 3.1. OSPF General Variables